Deflecting-wall for furnaces



G.. BAEHH AND E. L. MEssLER.

DEFLECTING WALL FOR FURNACES. APPLICATION FILED OCT. 23, 191.1.

Patented Apr. 13, 1920` 2 SHEETS-SHEET l.

IELZ.

INVENTOR Z7@ l G. BAEHR AND E. L. MESSLEB.

DEFLECTING WALLFOR FURNACES.

APPLICATION FILED OCT. 23, 1917.

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VUNITED STATES PATENT OFFICE.

GEORGE BAEHR AND EUGENE L. MESSLER, OF PITTSBURGI, PENNSYLVANIA.

nEELEcTrNe-WALL ron EURNAcEs.

To all 'wlw/n t may concern:

Be it hnown that we, GEORGE BAEHR and EUGENE L. MEssLER, residents of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and use- A ful improvement in Defiecting-ilValls for Furnaces, of which the following is a specification.

The invention relates to deflecting baffles or walls for furnaces. It is particularly useful in furnaces for heating steel billets or rails on a hearth which is subjected to the flames and gases from a furnace grate', but

is also adapted for vertical and horizontal.

fire boxes for boilers, etc.

The usual type of heating furnace for heating steel billets, rails and the like is a longitudinal one having a grate or oil, gas or powdered coal nozzles or burners at one end and a hearth extending over a considerable portion of the remainder of the furnace, and. with the hearth and grate separated by a dividing wall. Such a furnace is provided with an arched roof, the axis of which is parallel with the longitudinal axis of the furnace, and the central portion ofY which, if constructed in the most simple way, is a considerable distance above the hearth, so that the fla-mes from the grate tend to pass -along the roof without coming into contact with the steel on the hearth. ln order to avoid this the roof is sometimes constructed so that it slopes downwardly from above the grate toward the hearth and then upwardly toward the flue. At times it is also constructed flatV with no arch, or by a construction termed by the trade as a hanging or flat arch. While such constructions tend to direct the Haines from the grate onto the hearth, they are difficult to build and maintain, are quite expensive and are not capable of adjustment. The present invention has been devised to overcome these diffi- Specification of Letters Patent. Fama/nigga A131-, 13, 1920. Application filed October 23, 1917.

Serial No. 198,077.

Other objects and advantages will appear from the following specification.

An embodiment of the invention is shown in the accompanying drawings, in which,

Figure l is a longitudinal section through a furnace embodying' the invention; Fig. 2 is a transverse section on the line 2-2 of Fig. l, showing the deflecting baiile in one of itsA positions; Fig. 3 is a similar view showing the defiecting baiiie in another position; Fig. il is a detail view showing the construction of the fireproof slabs of which the deflecting bar le is built; Fig. 5 is a sectional vieW showing a modified form of slab; Fig. 6 is a transverse section through a furnace showing' a modified form of baflie g Fig. 7 isa front view of this baflie; Fig. 8 is an end view thereof; and Fig. 9 is a hori- Zontal section thereof on the line 9 9, Fig. S.

The furnace is provided with end walls l and 2,-side walls 8 and if, a grate 5, a hearth 6, a dividing or bridge wall 7 between the grate and hearth, and a straight arched roof S of simple form. The furnace is fired through the openings 9 in the front end wall l, the flames and'hot gases passing` from the grate 5 over the arch or dividing arch or wall 7, over the hearth 6 and out through the flue 10.

It will be noted that the construction thus far described is a simple one, particularly the roof structure, which is a simple straight arch. In such a structure, however, the flames and hot gases tend to pass along the roof of the furnace and in order to utilize them most efficiently it has heretofore been deemed necessary to give the roof a special shape so as to direct the flames and gases onto the hearth. In so doing, the structure of the roof has been made complicated, its cost increased and the maintenance made very difficult. This complicated roof structure is avoided in the present invention by making the roof of simple straight arched type, as shown, and providing a deflecting baille or wall of fireproof construction, which extends downwardly through a slot or opening in the roof of the furnace and projects a sufficient distance down in the furnace to deflect and direct the iames and hot gases from the grate onto the hearth. Figs. l to 5 show the baffle formed by a plurality of slabs 11, each of which is preferably independently mounted El O tion. prevent ,them from easily cracking and l?leaking, they are preferably reinforced in any suitable manner, as for example, by being suspendedv by suitable means, such as a rod 12 adjustably secured in the supportingbeam 13, which in turn is carried by uprights 14. The slabs are illustrated as being mounted so as to move in a vertical plane, but if desired they may be arranged so/as to extend into the furnace atan angle.

These slabs by reason of their position, are subjected to' intense heat and must be made sothat they will not disintegrate rapidly orbe destroyed by high temperatures. `They may be constructed of any suitable ireproof gmaterial, preferably of fire-brick ma'terials, thoughthey may be made as carbonslabs or ofA any other suitable composiln order to give them a body and with areinforcing of wire or rods, as shown at 15, Fig. 1l, madeV of metal which h'as a high'fusing point, preferably a vmetal which will not f use v, at 3000 degrees Fahrenheit.

V Chromo nickel wires or rods are particularly-suitable since this metal is capable of withstanding high temperatures and doesy not scale or disintegrate readily when subjected to varying temperatures.

These .wires or rods are used to form the body .of

the slab and the ,fireproof material, preferably fire brick material, is molded aboutA -them and hardened to make a reproof panel or slab which willwithstand the high 4temperatures to which it is subjected. It

will be noted that the construction herein provided .enablesthe slabs to be easily removed andreplaced so lthat the matter of substituting new slabs and in effect providv4ing a new deflecting baffle or wall becomes a very simple and inexpensive one. The slabs or panels. maybe made ofstandard size and lone substituted for the other without interfering with the operation of the furnace.

Carbon slabs, either reinforced or plain, maybe used instead of the fire clay slabs,

for awater-cooled pipe frame, as shown at 1.16, Fig-5, filled with lire brick may beem- ,v ployed.

These ireproof panels, when suspended for held in position so that their bottom edges form astraight line, constitute a heat- `deflecting baille or wall ywhich directs the :flames and hot gases from the grate onto the steel billets or the like 17 on the hearth.

This causes the steel to be swept by the flames and hot gases and thereby heated vmuch :more Aquickly and uniformly than would otherwise be the case. .theform ofbillets or rails occupies only a slabs Vopposite the vacant portion of the hearthmayv be lowered so lthat they close off this ,portion of the hearth and cause the lfthesteel in portion of the width of the furnacefthe .heatto be directed only to that -portion of the hearth containing the billets or rails,

heated without excessive waste ofl fuel.

as shown in Fig. 3. This conserves the heat of the furnace, lcauses more rapid heating and enables small quantities of steel to lig the furnace is long, several such deecting baffles orwalls may be used, at different points along the length of the furnace.

lnaddition to the above advantages, the reinforced delector sections may be raised and lowered to suit different sized billets or for the purpose of varying the rapidity of heating billets of high and low carbon steel.

This greatly increases the efficiency of the furnace and provides Va better control, thereby enabling a higher class product to be produced. In case any of thedeflector sections are broken they can be replaced while the furnace is still in operation'byl merely shutting off the blastvand quickly substituting a Vnew panel for vthe one that has been damaged,

Figs. 6 to 9 show a modified form in vwhich vthe baille ism a single structure extending the full width of the furnace.V is shown here, the battle is built up of suitable refractory blocks or bricks 20, held in aV and held in position by nuts orsimilar means 25 on the verticalpipes. ,Theend :pipes 22 will be connected to a suitable source of water supply, while the intermediate pipes23 will be connectedto an outlet, thereby securing water circulation Athrough these pipes to prevent themfrom burning out. Y V

This .baffleY is carriedbya channel or other beam 26 suitably,v secured to theA upperends of the pipesi23land2t by anysuitable means,

such as the nuts-27 or the like, threaded onV thel vertical pipes, said beam'being provided withveyes28 or other suitable attaching means for the.adjustingscrews, 12, which are arranged as shown in Figs. 1 to 3, and serve kas means for lifting and lowering the baille. W'ith this single baille the flame is deflected downwardly upony the hearth in the same manner as withthe bafesshown in Figs. 1 to 3. l p

These deflectors or baliesenable y the furnace to be vbuilt withva straight arched roofV whichy is not only. the .least expensive but also thermostfdurable. VA/Lt'thesame time ,the advantagesresu'lting from thefexpensive special roofr constructionsam secured -by means of the adjustable heat-deiecting baffie or wall. Additional advantages are secured in that better control of the furnace is secured and the defiectors are easily replaceable without suspending the operation of the furnace.

It is to be understood that the structures shown are for purposes of illustration only and that other structures may be devised which come within the spirit and scope of the appended claims. l

Vhat we claim is l. A heating furnace having a grate, a hearth, a roof, and a transverse heat delecting wall composed of a plurality of slabs of ire resisting material mounted for .independent movement in order to vary the effect of the heat from the grate on the hearth.

2. A heating furnace having a grate, a hearth, a roof, and a transverse heat deflecting wall composed of a plurality of sections so mounted that each may be moved independently of the others to Vary the directive effect on the hearth of the heat from the grate.

3. A heating furnace having a grate, a hearth, a roof, and a heat deflecting wall extending downwardly from the roof and comprising a plurality of independently movable sections arranged to be adjusted to vary the directive effect on the hearth of the heat from the grate.

4. A heating furnace having a grate, a hearth, a straight arched roof, and a heat deiecting wall extending downwardly from the roof and composed of a plurality of sections arranged to be independently moved to vary the directive effect on the hearth of the heat from the grate.

5. A heating furnace having a grate, ay hearth, a straight arched roof, and a heat delecting wall composed of fire-proof material depending from the roof and extending transversely of the hearth and adjustable toward and from the hearth to vary the directive effect on the hearth of the heat from the grate.

In testimony whereof we have hereunto set our hands.

GEORGE BAEHR. EUGENE L. MESSLER.

Vitnesses:

N. S. MILLEGAN, F. G. SMITH. 

